SAP Data Intelligence 3.1 on Rancher Kubernetes Engine 1 #

This guide describes an on-premises installation of SAP Data Intelligence (SAP DI) 3.1 on top of Rancher Kubernetes Engine (RKE) 1.

In a nutshell, the installation of SAP DI 3.1 consists of the following steps:

The installation of Rancher Kubernetes Engine 1 cluster is straight forward. After the installation and basic configuration of the operating system, the Kubernetes cluster configuration is created on the management host. Subsequently, the Kubernetes cluster is deployed.

The following sections describe the installation steps in more detail.

4.1 Preparing management host and Kubernetes cluster nodes #

 

All servers in our scenario use SUSE Linux Enterprise Server 15 SP2 (SLES 15 SP2) on the x86_64 architecture. The documentation for SUSE Linux Enterprise Server can be found at:

• https://documentation.suse.com/sles/15-SP2/

4.1.1 Installing SUSE Linux Enterprise Server 15 SP2 #

 

On each server in your environment for SAP Data Intelligence 3.1, install SUSE Linux Enterprise Server 15 SP2 as the operating system. This chapter describes all recommended steps for the installation.

Tip

If you have already set up all machines and the operating system, skip this chapter and follow the instructions in Section 4.2, “Configuring the Kubernetes nodes”.

• It is recommended to use a static network configuration. During the installation setup, the first opportunity to adjust network settings is when the registration page is displayed. In the upper right corner, click the button "Network Configuration …​":

  

  Figure 1: SLES Setup Registration Page #

   

• The Network Settings page is displayed. By default, the network adapter is configured to use DHCP. To change this, click the button "Edit":

  

  Figure 2: SLES Setup Network Settings #

   

• On the Network Card Setup page, select "Statically Assigned IP Address" and fill in the fields "IP Address", "Subnet Mask" and "Hostname":

  

  Figure 3: SLES Setup Network Card #

   

• During the installation, you also need to adjust the extensions that need to be installed. The Container Module is needed to operate RKE and Docker.

  

  Figure 4: SLES Setup Extensions #

   

• As no graphical interface is needed, it is recommended to install a text-based server:

  

  Figure 5: SLES Setup System Role #

   

• To run Kubernetes, the swap partition needs to be disabled. To do so, the partition proposal during installation can be adjusted:

  

  Figure 6: SLES Setup Partitioning #

   

• When opening the Expert Partitioner, the swap partition needs to be selected to delete it:

  

  Figure 7: SLES Setup Expert Partitioner Swap #

   

• After deleting the swap partition, there will be some space left that can be used to enlarge the main partition. To do so, the resize page can be called:

  

  Figure 8: SLES Setup Expert Partitioner Resize #

   

• The easiest way to use all the unused space is to select the "Maximum Size" option here:

  

  Figure 9: SLES Setup Resize Disk #

   

• Next, enable the NTP time synchronization. This can be done when the Clock and Time Zone page shows up during installation. To enable NTP, click the "Other Settings …​" button:

  

  Figure 10: SLES Setup Timezone #

   

• Select the "Synchronize with NTP Server" option. A custom NTP server address can be added if desired. Ensure to mark the check boxes for "Run NTP as daemon" and "Save NTP Configuration"; this is really important.

  

  Figure 11: SLES Setup NTP #

   

• When the Installation Settings page shows up, make sure that the:

  • Firewall will be disabled

  • SSH service will be enabled

  • Kdump status is disabled

  

  Figure 12: SLES Setup Summary #

   

• To disable Kdump, click its label. This opens the Kdump Start-Up page. On that page, make sure "Disable Kdump" is selected.

  

  Figure 13: SLES Setup Kdump #

   

• Finish the installation and proceed to the next chapter.

$ mkdir rke
$ cd rke
$ curl -LO https://github.com/rancher/rke/releases/download/v1.0.16/rke_linux-amd64
$ mv rke_linux-amd64 rke
$ chmod a+x rke

$ cd rke
$ ./rke config --name <name of your config file>

$ cd rke
$ ./rke up --config <name of your config file>

This section describes the installation of SAP DI 3.1 on an RKE 1 powered Kubernetes cluster.

$ kubectl create ns <NAMESPACE for DI 31>
$ kubectl get ns

$ cat CA.pem > cert
$ kubectl -n <NAMESPACE for DI 31> create secret generic cmcertificates --from-file=cert

$ curl -sSfL https://raw.githubusercontent.com/longhorn/longhorn/v1.1.0/scripts/environment_check.sh | bash

$ kubectl create -f https://raw.githubusercontent.com/longhorn/longhorn/v1.1.0/examples/storageclass.yaml

$ kubectl patch storageclass longhorn \
  -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

$ mv SLCB01_XX-70003322.EXE slcb
$ chmod 0700 slcb
$ export KUBECONFIG=<KUBE_CONFIG>
$ ./slcb init

$ kubectl -n sap-slcbridge get svc

$ export KUBECONFIG=<path to kubeconfig>
$ ./slcb execute --useStackXML MP_Stack_XXXXXXXXXX_XXXXXXXX_.xml --url https://<node>:<service port>/docs/index.html

This section provides some tips what should and could be done to maintain the Kubernetes cluster, the operating system and the SAP DI 3 deployment.

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